Mortising machine



1,642,723v H. DE WALLACE MORTISING MACHINE Filed sept.15. 192e 2 sheets-sheet 1 se t. 2o 1927. 1,642,723

p .,H. DE WALLACE l.

MORTISING MACHINE Filed Sept. l5, 1926 2 Sheets-Sheet 2 .Il J am' 111;@ AZ' il:

/z' /Z E SSP Patented sept. 2o, 1927.

.UNlrensTAfTEs-K PATENT- ori-img;

HARRY DE WALLACE, on sYnAoUsE, NEW YORK, AssieNoR To RAY L. oAn'rnngo vPHOENIX;NEW YORK. j

MoRrIsING MACHINE.

Applica/in ined september 13,1926. ser'iaiNo. 135,138.

This invention relates to portable mortising machines and hasparticular reference to means for preparing doors for the reception of the well knownmortise locks.

The object of the present invention is to provide a hand-controlled power 'driven mortising and routing machine in which'the tool` is operated by an electric motor, the

" motor and tool being` movablefbodily towards as well as at right angles to the work by hand-controlled means, for `sinkingl square and rectangular mortises. A further object I 1s to provide a bracket for supporting the mortising mechamsm, the bracket being adedge of a door, or other part. A further object is to provide meansV for slidably supl porting` the motor upona' member of the 2 bracket, the said means supporting a guide planes which enable the mortising tool to effect cuts parallel to the edge of the door. A further object is to provide manually controlled means for moving the motor and tool towards the door by measured steps, for pro` gressively sinking the mortises, andfor preventing the recoil or backward movement of `the motor and 'tool during the mortising operations.

3 simple means forenabling thermotor and tool tofbe moved away from,y the door at the end of the mortising operations. And

a further object is provide means `forjaccuratelyggaging the cutting range ofthe tool, for varying the height as well asf-,the

length ofthe mort-ise'.

I attain these objects lby the means set forth in the detaileddescription which follows, and as illustratedby the accompanyi F igurel is a front side elevation ofthe complete machine mounted upon a door or like part, in readiness to start the mortising work.l Fig. 2 is' abottom side view of the same. -Fig. 3 is arear end elevation ofthe machine. Fig. 4 is a front side view showing the motor and tool advanced to effect .if a downward cutting stroke. iFig. 5 is -a justable and adapted -tofbe. clamped to anA member,by which the motor is movable in Afurther object is to ,provide silnilar view showing the motor and tool in the'act'of effecting an upward cutting stroke. `50 Fig. 6 is a bottom face view of the guidebar, the shoe and the dovetail guide; showingthe jogging parts. Fig. 7 is a view of the operating lever. And Fig. 8 is a View of the sleeve andthe jogging fork vcarried by the lever. Y f In the drawings, 2 represents an'ordinary elect-ric -motor, Qthe outer lcasing thereof, and 2 is the armature shaft, which supports and drives the mortising or boring tool 3. Themotor and related parts are adjustably supported byv a .relatively long arml of a bracket 4', the. latter comprisingv adjustable clampingmembers /la-lf arranged in pairs, and which are adapted to grip the opposite faces of a door, or other part,A as A, at the opposite sides of a mortis-ek or other work', y as A. The clamping members of each pair are movable ltowards and from each other, by means of screws 41, vand 'said members are guided and 'partially' supported by 'rods 4. vThe clamps ta-4f 'are tied together by a web 4, to which the guide-bar is made rigid.v The motor 2 is movably Vmounted upon a shoe 5, whose opposite .edgesr slidably 'grip the bar 4,' the shoe' being arranged to be moved forwardly step by step during the mortising operations,carrying the motorwith it. lUpon the one face `ofthe shoe 5 1s transversely and rigidly 'mounted a 80 dovetail guide 6, which is engaged byl a correspondingly g'rooved or slotted.'legery i part 2 of the-motor casing, by ymeans of which the motor and .tool may be moved in planes parallel to one edge of the doorA, for sinking the mortis'es.fr The outer` facev of the guide 6 is formed withalongitudinal groove 6', and the ends ofthe guide are provided with upturned perforated lugs e-6b in which is journaleda' screw` 7, the latter having an operating-head 7', by which the screw is rotated. yThe screw 7 is provided with right and vleft handthreads, and' saidV threads engage similar angular vm1ts7a-7b, which are disposed near; the vopposite ends and'in the path of the gguijde-lug-Q, the nuts slidably engaging the groove 6. The turning of the screw 7 in opposite directions moves the nuts ,7L-"b towards and away from each other, or gaging the movements of the motor along the guide 6, and by means ot' which the height of the mortise A may be accurately determined. The outer face of the guide -6 is alsol provided with a scale (see Fig. l) ior predetermining the height of the mortises. In Fig. l, one edge of the nut 7 is in registry with one 'oil the longer graduations ol the scale, which may denote that the mortise to be cut by the tool 3, is say, l inches in height. Mortises of any suitable height within a certain range may be out, by simply adjusting the gage-nuts Ta-fb, as explained. Y

Thev motor 2 preferably moved along the'guide 6 manually, by means off a lever 8 one end of which is pivoted b y a pin 8 in a slot 4L* Aof the bar 4l. The medial portion of lever `8 is enlarged, andy vformed with a longitudinal slot 8v, which loosely engages a pin 9, the latter being rigid to the medial bottom portion of a yoke l0, the said yoke having its arms 10L made last to the'opposite Asides of the vmotor casing by screws 10d (see Figs. 2 and 3). The arms 10n olf the yoke are kprovided with similar openings 10b, through which the guide r6 plays. The yoke is preferably `expanded opposite the lateral edges ol the arm il, as at ll0, for providing suitable clearance when the motor is moved in opposite ydirections on the guide 6. By this provision, the lmotor may be raised and lowered for cutting relatively high imortises/ without interference by the `guide el or the yoke` 10. Therpin 9 projects beyond the yoke Vand is .preferably formed with 5a Vhead 9i', for preventing accidental detachment oil' the lever and related parts. The lever 8 telescopes a sleeve l2, 'whose tree end .is formed with a knob l2', and within this sleeve is disposed a :spring 8C, which serves to vcushion the Vparts yand preferably holds the sleeve extended. Beyond the .sleeve an integral arm 12a extends toward the motor and its lree endy is "formed with a fork 12, which straddles the pin 9. The `raising and depressing of the leverI 8, oirthe pivot 8',

V bodily raises and lowers 'the motor Aand tool for'efectingverticalcuts in the door A,

- as best seen in Figs. l and 5.` By this mea-ns, lthe vinner end of the y'mortise is cut parallel Ito the edge of the door and corresponds exactly to 'the usual angular dimen# sions 'of mortis-e locks.l l/Vhen the operator completes /each cut-ting stroke, he 'pushes and tool forwardly ay measured distance y'For sleeve l2 inwardlyagainst the tension of spring 8", and the fork 12C forces the motor positioning vthe tool, -for eifecting -the nent cut/,and .so on. The said jogging of the motor and tool-is regulated, and the motor is Yheld from recoil or backward, movement,

byV means or a rack 13 of relatively coarse pitch, which is mounted rigidly on the bottom or rear tace of the guide Ll, and by a pair or dogs 13, which are pivoted to the shoe 5, and have toothed jaws that engage the opposite sides of the rack, the dogs prei'- erably being held against the rack by a spring, as 13v (se-e Fig. 6). The ll'orward jogging oif the motor and tool may be regulatedby any suitablel means. A convenient .practice isv .to :advanre the motor follow-.ing

each cutting a distance equal to the spacing of adjacent teeth of the rack 13. The freel lor outer ends of the, dogs may be moved toward each other forv spreading the jaws, in a well known manner, for enabling the motor and toolV to be withdrawn from -the mortiselr. The arm il is provided with f aerl'forations lil and 14; which are engaged vance with the motor, the upward and .A downward strokes of the lever land tool fare orf the same length.v This insures Vthe cntting of the 'top and bottom margins -of all in'ortises substantially parallel to eachother. The motor 2 is preferably positioned midway :between the ends of the ope-rating leve-r S', and although the Amotors 2 are never very heavy., -this disposition of the lparts tends to greatly reduce -t-he actual weight lifted by the operator, and 'enables him -tor raise and lower the motor with -niore steaeliness than if the lever were otl'ierwise applied. The use of the sleeve Awith itisfyoke-ilc 'prevents the' pin 9 Itrom wearing the slot 8a and lengthening it. It enables theV operator rto move rthe yoke into engagement with the pin without disturl-iing the lever 8 or 1initially Lmoving the tool. vln this `coifni'ecti-on, itV `may be explained that the .sp-ringSc is preferably oit suc'h 'tension :as 'to `move and resiliently hold the slee-ve extended., but is not still"` enough Ato 'render lthe sleeve andL lever rigid as .one part. By'using fthe c-ush# ionedsleeve l2, there is no danger oit tthe operator forcing the tool and causing :it to choke. In case he` 'feeds .the motor lorwardly too rapidly. the spring '8 tends tok cushion the tool. Thisv `is -quite important, especially when the machine; is tmortis-ing doors .made of Xthe har-der woods. rrThe downward cutting strokes especially when the tool is relatively of small diameter and also when the Vdoor-or othery work. consists 4what I claim, is-

jotv the softer varieties-of wood,- like pine, lred ivood, wlntefwood, and the like, may ,be elifected by gravityalone.

ed on said shoe, for enabling the motor toL be moved bodily in planes parallel to the edge of the door, a lever pivoted in the slot oi the guide-arm for moving the motor along said guide, means carried by said lever for advancing the motor for progressively sinking a mortise in the edge of the door, and means carried by said guide-arm and said shoe for maintaining each advance kof the motor.

2. The combination with a motor and a tool driven thereby and a bracket adapted to be clamped to the edge of a door having a guide arm :torV supporting lthe motor at a distance from the door, of a shoe slidable on said guide-arm, a transversely disposed guide member carried by said shoe on which the motor is slidable, a lever pivoted to the guide-arm and to a part carried by the motor for moving the motor bodily on said guide member in planes parallel to the edge of the door, means carriedby the lever for' ogging the motor and said lever towards the door for progressively sinking the mortise, and. means for preventing backward movement of the motor during the mortising operation.

3. The combination with an enclosed motor and tool driven thereby, and a bracket adapted to be clamp-ed to an edge of a door having a guide-arm, and a shoe slidable on said guide-arm towards and away from the door, of a guide member mounted transversely on said shoe and engaging a groove in the motor casing, a yoke carried Vby the motor and' straddling said guide-arm, a lever pivoted intermediate its ends to' said yoke adapted for movingsaid motor along said guide member for enabling the tool to cut mortises whose ends as well as its top and bottom edges are parallel, a sleeve telescoping said lever adapted for advancing the motor at the end of each cutting stroke, and means for enabling said lever to effect cutting strokes of the same length throughout the mortising operation.

4. A door mortising machine including a bracket adapted to be clamped to the edge of a door, and having a guide-arm provided with a slot near one end, a shoe slidable on said guide-arm, a guide member mounted transversely on said shoe, an encased motor and a tool driven thereby, said casing having a groove to receive said guide member, a

yoke secured to the motor casing and straddling the casing and said shoe, means pivoted in the slot of said guide-arm andalso to said yoke for moving the motorfinopposite directions on said guide member, for enab- .ling` the-tool to effect cuts parallel to the edgeof the door, means for radvancing the motor at the end of each cutting stro-ke, and means carried by said guide-arm and said shoe, for preventing backward movement of the motor and tool during the mortising operations.

5.' A door mortising machine including im encased motor and a tool driven thereby, the casing oi" the motor having a transverse groove, a yoke straddling the motor having a pin registering with the axis of the motor, a bracket adapted to be clamped to an edge of a door having a guide-arm extending through said yoke and having a slot adja-l cent the door, a lever having its remote end pivoted in the slot of the guide-arm, and engaging the pin loli the yoke adapted to move the motor in planes parallel to the edge of the door and transversely to the guide-arm, means carried by the guide-arm, for moving the motor towards and away from the door, means engaging the groove ot the motor casing for guiding the motor' in its transverse movements, and means carried by said lever for' jogging the motor and said lever towards the door at the end of each cutting stroke by the tool. l

G. In a mortising machine, a motor driven tool, means lor slidably supporting the motor, means to raise and lower the motor including a lever having pivotal and slidable connection intermediate its ends with the motor, and means to connect one end of the lever to the supporting means so as to permit the lever to have pivotal and bodily slidable movement relative to the supporting means so as to advance with the motor.

7 In a mortising machine, a motor driven tool, means for slidably supporting the motor, means to advancel the motor, means havingpivotal and slidable connection with the motor to raise and lower the latter, and means to connect the raising and lowering means'to the supporting means for pivotal andv slidable movement relative thereto so as to enable the raising and lowering means to advance with the motor.

8. .In a mortising machine, amotor driven tool, means for slidably supporting the motor,-means to raise and lower the motor including a lever slotted intermediate its ends, a projection having rigid connection with the motor received in the lever slot, a spring pressed sleeve slidable on one end of the lever and engageable withk said projection to advance the motor, and means to connect the kll() opposite end of the leverl to the supporting means for pivotal and sliding movement 15001,1nean-s for ,sdably supporting the modior, Ymeans tovlaise eind lower .the motor 1nfeluddng a lever having pivotal mld aslideb'le eonneeton vintermediete its ends with the motor, means to oolmect one end fof the 'lever to the .supporting means so as to per ,mtthe lever' to have pivotal 1an-d bodly .slideble movement relative to 'the' `supporting mezmsso es to .advance with the motor, :and

means sldably-oarred lFeyJ1-herleven' 01' wd- 10 venom-g the motor. In testimony whereof lah-"1X my signature.

Y [HARRY DE WALLAGE. 

